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Finding the Fourth Proportional to 627,406.39, 865,750.54 and 355,416.03

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Solution

The fourth proportional to 627,406.39, 865,750.54 and 355,416.03 is: 490,434.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,406.39 : 865,750.54 = 355,416.03 : x
  2. Step 2: Convert to fraction form
    627,406.39/865,750.54 = 355,416.03/x
  3. Step 3: Cross multiply
    627,406.39x = 865,750.54 × 355,416.03
  4. Step 4: Simplify right side
    627,406.39x = 307,701,619,897.16
  5. Step 5: Solve for x
    x = 307,701,619,897.16/627,406.39
  6. Step 6: Final answer
    x = 490,434.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.